Improvement in brick-kilns



coma swa fiat-rat dijijiirr.

Letters Patent No. 101,124, dated March 22, 1870.

IMPROVEMENT BRICK-KENS.

The Schedule referred to in these Letters Patent and makiugpart of thesame To all whom it may concern Be it known that I, SILAS M. HAMILTON,of the city and county of Baltimore, and State of Maryland,

- have invented a new and useful Improvement in Ghim' neys or Flues forBrick-Kilns; and I hereby declare, the following to be a full, clear,and exact description thereof, which will enable those skilled in theart to make and use the same, reference being bad to the accompanyingdrawings making a part of this specification, in which- Figure I is aside elevation of a continuous brickkiln, with a portion of its sidewall broken away so as to show the application of my improved fine orchimney.

Figure 11 is a plan or top view of a kiln, showing the grates upon whichthe fuel is burned.

' Figures III, IV, V, and VI are vertical elevations of different formsof the flue or chimney, being end views of the same, showing the form oftheirrrosssections.

Figure VII is a vertical sectional elevation, showingtheperforationsthrough which the productsof combustion are admitted-tothe vertical fine.

Figure VIII-is a transverse section, which maybe used in connection withany one of the fines for the purpose of lengthening the same.

Corresponding letters refer to corresponding parts in all of thefigures.

In brick-kilns as heretofore constructed, the chimneys or flues havebeen made to occupy fixed positions, which arrangement has been found tohe a source of grcat delay and expense in the burning of bricks, fromthe fact that the heated'prodncts of'combustion have a tendency totravel in straight lines from the grate 01' place where thefuel isburned to the uptake or fine which conducts them to the atmosphere abovethe top of the kiln. In consequence of the aboverecited facts, greatdifliculty has been experienced in 1geltting the bricks to burn evenlyin all' parts of the My object in the present invention is to" provide arerledy for the above referred todifficulty, and to this en It consistsin providing a portable flue or chimney, which is to be provided withperforations from its lower end upward to a point about equal in heightjto that to which the bricks to be burned are piled in th'e kiln, theperforations being largest at the bottom or lower end of the fine, anddiminishing in area as they approach the upper end.

A, in the drawings refer to a brick-kiln, which may be of the form shownin the drawings which accompany the application of mine uowpending inthe United States Patent Oflice, or of any other form, the one shownbeing intended to be used in sections, so that .of its sides with aseries of holes,

a portion of I it may be used for burning brick, while other portionsare being emptied of brick already burned, or filled with those whichare to be burned.

B B refer to apertures in the walls, into which portable furnaces may beslid, if desired, for receiving the fuel to be burned. Two rows of suchapertures are shown. The upper ones may bearsed if found desirable, butthey are not indispensable to the successful operation of the kiln.

O 0 refer to a series of grates which extend trans versely across thekiln, so that access may be had to them from either side, for thepurpose of placing fuel thereon.

D D refer to the chimney or flue which carries oil" the products ofcombustion from such kilns.

D refers to a portable perforated chimney or flue, it having onesemicircular or rounded side, and one flattened side, as shown at fig.3. This form of flue maybe varied, as shown at figs. 4 and 5; but Iprefer the form shown at fig. 3, it being the most convenient forgeneral purposes. This fine or chimney may be made of any suitablematerial, such as iron or any other metal, or. it may be of burned clay,or any otherrefractory material which will not be destroyed by the heat.It is 'to be perforated upon both or all the largest of which are to beat its lower end, from which point they diminish in area as theyapproach the upper end until they reach a point as high as it isdesirable to pile the bricks, or a point as high as it is desirableto'take 'ofl' the heated gases through such lines where they terminote,and the remaining portion of the flue is solid, or without perforations,and may be extended in this form to any desired height.

The various forms of flues -or chimneys shown are all upon the sameprinciple, varying only in form, and may be used in place of the onedescribed, if found to be more economical in construction, or better 'inany other respect.

D refers to a section of a flue or chimney which may he used to lengthenthe main one, whenever it becomes .necessary to increase the draughtfrom the fires.

Some of i the advantages due to my portable chimney may be stated asfollows:

It is perfectly portable, and may be easily moved from'one place toanother, and consequently it may be'placed in such a position (or morethan one may housed, and they be placed in such positions in the kiln)as to equalize, the draught from the fires, and thus cause a nearlyperfect equalization of the heat throughout the kiln,- the result ofwhich will be, that the bricks in the corner or other parts of the kilnwhich are remote from the fires will have a sufficient amount of heatconducted to them to burn them, nearly-as quick as those which arenearer to the fire.

or pottery, a. portable perforated chimney, extending from the bottom toa point above the top of the kiln,

whether constructed in one piece or in sections, substantially as setforth.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses. I

- S. M. HAMILTON. Witnesses:

D. P. HOLLOWAY, F. H. SPRAGUE.

